Page "Pentland Firth" Paragraph 22

Porpoises.

Again can be seen all year round in all parts of the firth although they tend to favour shallower water.

Grow to about 1. 5m, black, with a broad based triangular fin which can be seen as they surface.

It has a small, rotund body with a short, blunt head, no beak, and a small, triangular dorsal fin.

Usually seen singly or in small numbers although in the autumn many groups may be seen in Gills Bay.

When in groups tend to swim in a more random fashion than Dolphins who swim together.